[LLVMbugs] [Bug 24320] New: [Windows] _crt_va_arg is miscomputed

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24320

            Bug ID: 24320
           Summary: [Windows] _crt_va_arg is miscomputed
           Product: clang
           Version: 3.7
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: compnerd at compnerd.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14675
  --> https://llvm.org/bugs/attachment.cgi?id=14675&action=edit
reduced.c

_crt_va_arg is miscomputed when dealing with variadics on Windows.  In debug
builds, this is most easily visible, with the argue being off by 12 bytes.

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